import sys
o=""
acc=65
for line in sys.stdin:
for cmd in line:
if cmd == 'p':
acc += 1
elif cmd == 'o':
o+=chr(acc)
if acc == 91:
acc = 32
elif acc == 33:
acc = 65
print o
Note that non-ascii characters in the above source code will be escaped (such as \x9f).